The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

Wan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • multi function sensor based on Rectangular Lattice photonic crystal fiber with high pressure sensitivity
    Sensors and Actuators A-physical, 2020
    Co-Authors: Wan Zhang, Shuqin Lou, Xin Wang, Shibo Yan, Zijuan Tang, Zhen Xing
    Abstract:

    Abstract A multi-function sensor based on Rectangular-Lattice photonic crystal fiber (RL-PCF) is presented and experimentally demonstrated by using Sagnac interferometer configuration into which a segment of the homemade RL-PCF is inserted. By detecting the wavelength dip shift in Sagnac transmission spectrum, the measurement of pressure, strain, curvature and temperature can be achieved. A high pressure sensitivity of 11.15 nm/MPa are obtained. To the best of our knowledge, it is the highest pressure sensitivity of the sensor based on Sagnac interferometer with PCF. The strain, curvature and temperature sensitivities are 2.92 pm/μe, −339.85 pm/m−1, and 466.18 pm/°C, respectively. Experimental results demonstrate that the designed multi-function sensor based on RL-PCF takes advantages of high sensitivity, simple structure, and multi-function sensing, which makes it have a great potential in pressure detection, environmental tests and other industrial applications.

  • A design for single-polarization single-mode photonic crystal fiber with Rectangular Lattice
    Optics Communications, 2016
    Co-Authors: Wan Zhang, Ya Jie Bao, Zhen Kai Fan, Shu-guang Li, Guo Wen An
    Abstract:

    A design for single-polarization single-mode photonic crystal fiber with Rectangular Lattice is proposed in this paper. The proposed fiber is studied by the full vector finite element method with perfectly matched layers. The single-polarization single-mode operation region of the fiber is achieved in a certain wavelength range with low confinement loss include the wavelength of 1.55 μm. The loss of one polarization is 0.124 dB/km at the wavelength of 1.55 μm and the confinement loss of the other one polarization is very high which can not ensure the transmission in the fiber. The single-polarization single-mode photonic crystal fiber is desirable for some polarization-sensitive applications such as high-power fiber lasers, fiber optic gyroscopes, current sensors and optical coherent communication systems.

  • high sensitivity refractive index sensor based on d shaped photonic crystal fiber with Rectangular Lattice and nanoscale gold film
    Plasmonics, 2014
    Co-Authors: Wei Qin, Wan Zhang, Zhen Kai Fan, Ya Jie Bao
    Abstract:

    We propose and investigate a D-shaped photonic fiber refractive index sensor with Rectangular Lattice based on surface plasmon resonance. In such sensor, the nanoscale gold metal film is deposited on the flat surface where it is side polished. Numerical results show that the average sensitivity of Au-metalized surface plasmon resonance (SPR) sensor could reach as high as 8,129 nm/refractive index unit (RIU) in the dynamic index range from 1.35 to 1.41 as well as 2,000 nm/RIU from 1.33 to 1.35. Compared to conventional Au-metalized SPR sensors, the performance of our device is obviously better, and the production process is greatly simplified.

R. R. Levitskii - One of the best experts on this subject based on the ideXlab platform.

  • phase diagrams of spin 3 2 blume capel model on Rectangular Lattice under longitudinal magnetic field
    Physica B-condensed Matter, 2013
    Co-Authors: O. R. Baran, R. R. Levitskii
    Abstract:

    Abstract The spin-3/2 Blume–Capel model on a Rectangular Lattice with the ferromagnetic bilinear short-range interaction K F = K ( 1 + x ) in one direction and the anti-ferromagnetic one K AF = K ( − 1 + x ) in the perpendicular direction under a longitudinal magnetic field and in the presence of a single-ion anisotropy is investigated within the mean field approximation. The quantity x characterizes coupling between the interactions in the perpendicular directions and its absolute value does not exceed unity. Basing on the study of temperature dependencies of subLattice magnetizations the phase diagrams in the (x, temperature) plane are constructed for different values of the longitudinal magnetic field and the single-ion anisotropy. The global phase diagram of the model demonstrates an unusual abundance.

  • Influence of transverse field on the spin-3/2 Blume–Capel model on Rectangular Lattice
    Journal of Magnetism and Magnetic Materials, 2012
    Co-Authors: O. R. Baran, R. R. Levitskii
    Abstract:

    Abstract Transverse field effect on thermodynamic properties of the spin-3/2 Blume–Capel model on Rectangular Lattice in which the interactions in perpendicular directions differ in signs is studied within the mean field approximation. Phase diagrams in the (transverse field, temperature) plane are constructed for various values of single-ion anisotropy.

Anping Zhao - One of the best experts on this subject based on the ideXlab platform.

  • confinement losses and optimization in Rectangular Lattice photonic crystal fibers
    Journal of Lightwave Technology, 2005
    Co-Authors: Mingyang Chen, Anping Zhao
    Abstract:

    Confinement losses in highly birefringent Rectangular-Lattice photonic-crystal fibers (RLPCFs) are investigated by the multipole method. The losses are strongly polarization dependent, which is due to the anisotropic properties of the cladding. The feature is applied to construct a new kind of single-polarization single-mode photonic-crystal fibers (PCFs), which is based on large differential loss between the two polarizations of the fundamental mode. Furthermore, it is found that the birefringence of RLPCFs is determined mainly by the air holes near the defect core. Consequently, a sandwiching (between triangular structures) Rectangular configuration that has the property of reducing leakage loss while simultaneously retaining the birefringence of RLPCF is proposed.

  • polarization properties of Rectangular Lattice photonic crystal fibers
    Optics Communications, 2004
    Co-Authors: Mingyang Chen, Anping Zhao
    Abstract:

    Polarization properties of Rectangular Lattice photonic crystal fibers are investigated. The birefringence of the fibers is found to be due to the birefringence of the cladding, which is analyzed by the plane wave expansion method applied to that of a single unit cell. Increased birefringence can be achieved by the reduction of the width and length ratio of Rectangular Lattice in the fibers. Birefringence in the fibers with a missing air-hole as a defect core is calculated by the compact two-dimensional finite-difference time-domain method. Based on the analysis of anisotropic properties of the cladding Lattices, optimization of fiber core by inserting a center hole is also presented. The achievement of high birefringence and broad single-mode region in the fibers is demonstrated numerically.

  • highly birefringent Rectangular Lattice photonic crystal fibres
    Journal of Optics, 2004
    Co-Authors: Mingyang Chen, Anping Zhao
    Abstract:

    The dispersive and birefringent properties of Rectangular Lattice photonic crystal fibres with circular air-holes are investigated. The fibres have twofold rotational symmetry and present the split of the fundamental cladding mode and the lifted degeneracy of the two polarization states, which lead to large birefringence and special behaviour of group-velocity walk-off. The properties are closely tied to the underlying radiation states of the Rectangular Lattice. In addition, the technique of fabricating the proposed fibres with the stack-and-draw procedure is presented.

Ya Jie Bao - One of the best experts on this subject based on the ideXlab platform.

  • A design for single-polarization single-mode photonic crystal fiber with Rectangular Lattice
    Optics Communications, 2016
    Co-Authors: Wan Zhang, Ya Jie Bao, Zhen Kai Fan, Shu-guang Li, Guo Wen An
    Abstract:

    A design for single-polarization single-mode photonic crystal fiber with Rectangular Lattice is proposed in this paper. The proposed fiber is studied by the full vector finite element method with perfectly matched layers. The single-polarization single-mode operation region of the fiber is achieved in a certain wavelength range with low confinement loss include the wavelength of 1.55 μm. The loss of one polarization is 0.124 dB/km at the wavelength of 1.55 μm and the confinement loss of the other one polarization is very high which can not ensure the transmission in the fiber. The single-polarization single-mode photonic crystal fiber is desirable for some polarization-sensitive applications such as high-power fiber lasers, fiber optic gyroscopes, current sensors and optical coherent communication systems.

  • high sensitivity refractive index sensor based on d shaped photonic crystal fiber with Rectangular Lattice and nanoscale gold film
    Plasmonics, 2014
    Co-Authors: Wei Qin, Wan Zhang, Zhen Kai Fan, Ya Jie Bao
    Abstract:

    We propose and investigate a D-shaped photonic fiber refractive index sensor with Rectangular Lattice based on surface plasmon resonance. In such sensor, the nanoscale gold metal film is deposited on the flat surface where it is side polished. Numerical results show that the average sensitivity of Au-metalized surface plasmon resonance (SPR) sensor could reach as high as 8,129 nm/refractive index unit (RIU) in the dynamic index range from 1.35 to 1.41 as well as 2,000 nm/RIU from 1.33 to 1.35. Compared to conventional Au-metalized SPR sensors, the performance of our device is obviously better, and the production process is greatly simplified.

H M Ronnow - One of the best experts on this subject based on the ideXlab platform.

  • staggered flux state for Rectangular Lattice spin 1 2 heisenberg antiferromagnets
    Physical Review B, 2020
    Co-Authors: N E Shaik, Dalla B Piazza, D A Ivanov, H M Ronnow
    Abstract:

    We investigate the spin-$\frac{1}{2}$ Heisenberg model on a Rectangular Lattice, using the Gutzwiller projected variational wave function known as the staggered flux state. Using Monte Carlo techniques, the variational parameters and instantaneous spin-spin correlation function for different coupling anisotropies $\ensuremath{\gamma}={J}_{y}/{J}_{x}$ are calculated. We observe a gradual evolution of the ground state energy towards a value which is very close to the one-dimensional (1D) estimate provided by the Bethe ansatz and a good agreement between the finite-size scaling of the energies. The spin-spin correlation functions exhibit a power-law decay with varying exponents for different anisotropies. Though the lack of N\'eel order makes the staggered flux state energetically unfavorable in the symmetric case $\ensuremath{\gamma}=1$, it appears to capture the essence of the system close to 1D. Hence we believe that the staggered flux state provides an interesting starting point to explore the crossover from quantum disordered chains to the N\'eel ordered two-dimensional square Lattices.